673661745625 has 20 divisors (see below), whose sum is σ = 918335701008. Its totient is φ = 489935810000.

The previous prime is 673661745623. The next prime is 673661745629. The reversal of 673661745625 is 526547166376.

It is not a de Polignac number, because 673661745625 - 2¹ = 673661745623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 673661745625.

It is not an unprimeable number, because it can be changed into a prime (673661745623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48986707 + ... + 49000456.

Almost surely, 2^673661745625 is an apocalyptic number.

It is an amenable number.

673661745625 is a deficient number, since it is larger than the sum of its proper divisors (244673955383).

673661745625 is an equidigital number, since it uses as much as digits as its factorization.

673661745625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97987194 (or 97987179 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 58.

The spelling of 673661745625 in words is "six hundred seventy-three billion, six hundred sixty-one million, seven hundred forty-five thousand, six hundred twenty-five".